Apparatus for pressing hollow ware.



No. 720,718. 'ATEfiTEb FEB.17, 1903-. w. E. MADDOGK & w. ORME.

APPARATUS FOR PRESSING HOLLOW WARE.

APPLICATION FILED FEB. 4, 1901.

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WITNESSES.

' 'PATENTED FEB. 17, 1903. w. E. MADDOGK & w. ORME. APPARATUS FORPRESSING HOLLOW WARE.

APPLICATION FILED FEB. 4, 1901.

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I wi m sszs. MM ZZKZZZZZ No 720,718. PATENTED FEB. 17, 1903..

'W. E. MADDOGK & W. ORME.

APPARATUS FOR PRESSING HOLLOW WARE rum-non nun rnn.4,19o1. no 101121.. Ia sums-sum WIN/Emmi A d mjumlg I I I u INVENTORS handwork in UNITED.STATES WILLIAM E WARD PATENT OFFICE. A

MAnDooK, OF'WOLSTANTON, AND WILLIAM ORME. or 'BURISLEM, ENGLAND.

APP R TUS For: PRESSlN G-HOLLOW WARE.

srncmxoa'rron forming part of Letters Patent No. memo, dated February17, 1903.

Application filed February 4,1901. Serial No.

To all whom it may concern.-

Be it known thatwe, WILLIAMEDWARD MADDOCK, residing at Dimsdale View,Porthill, Wolstanton, and WILLIAM ORME, residing at 59 Liverpool road,Burslem, in the county of Stafford, England, haveiuvented certain newand useful Improvements in Apparatus for Pressing Hollow Ware, (forwhich we have made application for patent in Great Britain, No. 12,937,on the 18th of July, and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention for improvements in apparatus for pressinghollow warehasfor its object to substitute machine-work for the usual the process ofmolding hollow ware-such as jugs, cups, -vegetable-dishes, vases,flower-pots, mugs, and the like, both in earthenware, china, made fromplastic clays.

The invention consists in placing a sheet of clay or the like over thecore or chum, inserting the core or chum, mold corresponding to theouter surface of the article to be molded, expanding the core or chumcorresponding to the inner surface of the article and so forcing theclay to take the impression and shape of both the outer mold and innermold, collapsing the expanded core or chum, withdrawing the core or chumthe from the article, reinserti u g the collapsedcore or chum, andopening out the mold, when the finished article'will be left looselapsed core or chum.

In one way of carrying out this invention parts of the mold are fixed onslides," so that they can be brought together or separated.

The core or chu m consists of an elastic cover supported on a solidshape provided with means for introducing fluid-pressure into theelastic cover.

In the accompanying three sheets of illustrative drawings, Figures 1 and2 are side elevations, at right angles to one another, of an apparatusfor molding hollow ware. Fi 3 is a section of the mold and core ries theslides b,

1900;). The plunger d, slidingverti- 6 or marl and the like-- with-theclay, into the,

on the col-- or chum,

45.996. No model.)

showing the parts in the position they occupy just before the inoldisclosed; and Fig. 4 is a similar view showing the parts in the positionthey occupy just after the core or chum is expanded to-force the twosides 0 c and the bottom 0 The machine=frame ct, providedwith the tablea, carto which are attached the two sides 0 c.

cally in the frame a, carries the bottom 0 of the mold. The plunger d isoperated by a con nterweightedlever e,fu1crumed to a link e, pivoted tothe frame a at 6 The upper end of the plunger head (1', that isconnected by the adjustable side links f to the levers f,,fulcrumedftothe frame a at f and connected to the slides b'by means of apinvand-slot connection. By this mechanism when the lever e is pulleddown '70 the sides 0 0 close in together, and the bottom descends ontothe sides to form a complete mold, the parts moving simultaneously.

"The adjustable 'sidelinks f enable the parts to be adjustedisothat asthe two sides come 7 5 together the bottom comes onto them.

The two sides 0 c' of the mold are'hollow and are connected to inlet andoutlet pipes g g, fitted with sliding joints g g to allow of themovements of the sides. Steam or other 8o heating agentcan be admittedthrough the pipes to heat the mold.

. The core or chum h fits onto the block 71., that is fixed to the frameZ, sliding vertically below the table on the side bars a of the frame ja, so that the core or chum can be raised verticallyinto the mold orlowered out of it. The frame I is operated by the hand-lever m,fulcrumed at m and connected by the link in to the frame I. a passage71. for admitting fluid, and this passage communicates with a similarpassage extending'to the top of thecore or chum h.

The core or chum consists of the foot or lower part, that fits in themold, (the mold being'inverted the top is now at the bottom,)'and of theupper part, on which is fitted the elastic cover or envelop n, that issecured around the foot or lower part of the core or chum.

the clay into the mold. 5 5' As shown, the mold is made-in thr'eepartsdhas fixed on-it a cross- 65 The block hf is provided with 0 and closesthe top 'of Preferably the elastic 10o dried form comprising an same andsecured thereto cover consists of vulcanized indiarubber moldedapproximately to the shape of the internal surface of the article to bemolded.

The operation of the apparatus is as follows: The collapsed core or chumIt being raised above the table a, a layer of clay is placed over it.The lever e is then operated to bring the mold c c 0 around the core orchum, so that the parts fit closely together. If the clay is plastic,the mold is continuously heated by steam or other heating agent admittedthrough the pipes g g and exhausted through pipes g g. If the clay is ina semidried condition, it is. placed over the core or chumin a roughform and approximately similar in shape. In this case the mold would notrequire heating on account of the rough form having already been driedto a consistency to allow of being handled when it came from the mold.Fluid-pressure is then admitted through the passage 71. to expand thecore or chum cover n and force the clay evenly into the mold. The covern is then collapsed by relieving the pressure and, if necessary,applying a vacuum, and withdrawn (to allow the steam or vapor to escapeout of the inside of the article) by operating the lever m and is againreinserted. The lever e is now raised to separate the parts cc 0 ofthemold, and the molded article is left loosely on the chum. What we claim,and desire to secure by Letters Patent, is-- 1. In a molding-machine, amold corresponding in shape to the outer surface of the article to bemolded,'a core or chum adapted or a rough semiinternal support, anelastic cover situated over the. top of the at its lower edge, a

to support a sheet-of clay the mold.

2. A core or chum for molding hollow ware consisting of a support, anelastic cover situated over the top' and sides of the support and havingits bottom edge secured to the support, and a means'foradmittingfluidpressure between the support and the cover. a

3. The apparatus for molding hollow ware consisting of slides carryingthe parts of the mold, a means for operating the slides so that they canbe brought together to form the mold or be separated to open out themold, a core or chum adapted to support a sheet of plastic clay, a meansfor inserting the core or chum with the clay upward into the mold, and ameans for expanding or contracting the core or chum.

4. The-apparatus for molding hollow wave consisting of slides carryingthe parts of the mold, a means for operatingthe slides so that r theycan be brought together to 'formthe.

slide carrying the core orchum, a means for operating the core or chumso that it can be inserted with the clay into the mold or withQtj; drawntherefrom and ameans for expanding or contracting the core or chum. I

In testimony whereof we have affixed our signatures in presence of twowitnesses.

' WILLIAM EDWARD MADDOGK. v V WILLIAM ORME. Witnesses:

A. V. BROOKE, JOHN H. COPESTAKE.

s 'mold or be separated to open out the mold, at;

